The duties of federal justices is really quite simple: interpret the law to settle disputes in matters of law. Ignorance of the law is not bliss.
Like the Bereans, we must study scripture to validate what we hear from the pulpits. Likewise, we must read and study foundational documents - the Constitution, Declaration of Independence, Federalist Papers and writings of our Founding Fathers - to validate federal court opinions and Acts of Congress.
America, as Israel was at the time Isaiah wrote chapter 9, is undergoing judgement. Our proper response then and now should be national repentance, turning from sin and calling on the Name of God to have mercy on us.